KR20060133777A - The method of production increase of light olefins from hydrocarbon feedstock - Google Patents

Abstract

A method for increasing production of a light olefin hydrocarbon compound from a hydrocarbon feedstock is provided to reduce the amount of hydrogen used in the process. A hydrocarbon feedstock(11) is fed into a pyrolysis furnace(131) to conduct a pyrolysis reaction. Reaction products which are generated from the pyrolysis reaction are separated into a stream containing hydrogen(12) and C4 or lower hydrocarbons, and a stream containing C5+ hydrocarbons through a compression and fractionation process. Hydrogen, and C2, C3 and C4 olefin and paraffin hydrocarbons are respectively recovered from the stream containing hydrogen and C4 or lower hydrocarbons. Pyrolysis gasoline and a C9+ hydrocarbon-containing fraction are separated from the stream containing C5+ hydrocarbons using hydrogenation and separation processes. A mixture of the separated pyrolysis gasoline, a hydrocarbon feedstock, and hydrogen is fed into at least one reaction area. The mixture in the presence of a catalyst in the reaction area is converted into an aromatic hydrocarbon compound which is rich in benzene, toluene, and xylene through dealkylation/transalkylation reactions, and is converted into a non-aromatic hydrocarbon compound which is rich in liquefied petroleum gas through a hydrocracking reaction. Reaction products of the mixture converting step is converted into an overhead stream(19), which contains hydrogen, methane, ethane, and liquefied petroleum gas, and a bottom stream(18), which contains aromatic hydrocarbon compounds, and a small amount of hydrogen and non-aromatic hydrocarbon compounds, by using a gas-liquid separation process. The overhead stream is circulated into the compression and fractionation process. The aromatic hydrocarbon compound is recovered from the bottom stream.

Description

The method of production increase of light olefins from hydrocarbon feedstock}

1 is a process diagram showing one embodiment of tranking light olefinic hydrocarbons from a hydrocarbon feed mixture according to the present invention.

FIG. 2 is a process diagram showing another embodiment of the light olefin hydrocarbon transpiration from a hydrocarbon feed mixture in accordance with the present invention.

FIG. 3 is a process diagram illustrating another embodiment of the light olefin hydrocarbon transpiration from a hydrocarbon feed mixture in accordance with the present invention.

※ Explanation of code about main part of drawing ※

1: heat exchanger 2: heater

3: reactor 4: gas-liquid separator

5: chiller 6: compressor

7: classification unit 11: hydrocarbon raw material mixture

12: hydrogen 18: bottom flow

19: top flow 28: benzene

29: toluene 30: xylene

111: Hydrocarbon Raw Material Mixture

118: ethylene 119: propylene

120: ethane 121: propane

122: butane 124: pyrolysis gasoline

127: fluidized bed catalytic cracking gasoline

131: pyrolysis furnace 132: compression and fractionation

133: cooling unit 134: hydrogenation and separation unit

135: classification unit 136: classification unit

The present invention relates to a process for the transpiration of light olefinic hydrocarbons from hydrocarbon feed mixtures. More specifically, C2-C4 light olefin system by integrating a process for producing an aromatic hydrocarbon mixture and liquefied petroleum gas (LPG) from a hydrocarbon mixture, and a production process of a hydrocarbon raw material that can be used as a feedstock for the process. It relates to a method for increasing the yield of hydrocarbons.

In general, in addition to naphtha, pyrolysis gasoline, a reaction product of a pyrolysis process, and a reaction product of a catalytic reforming process may be used as a feedstock for producing an aromatic hydrocarbon mixture and / or LPG from a hydrocarbon mixture. Fluidized bed catalytic cracked gasoline, which is a reaction product of reformate and fluidized bed catalytic cracking processes, is used.

Here, the pyrolysis process is a process of producing a petrochemical base oil such as ethylene and propylene as a main product using an oil such as naphtha as a raw material. In this process, an oil rich in aromatic compounds such as pyrolysis gasoline is produced as a by-product.

In the catalytic reforming process, heavier naphtha is used as a raw material to produce gasoline or benzene, toluene, xylene, and C9 + aromatic hydrocarbons, and the oil-rich oil component is produced in the process. Will be.

In addition, the fluidized bed catalytic cracking process produces a gasoline fraction rich in ethylene, propylene, and aromatic components using heavier oil as a raw material than the raw material of the catalytic reforming process.

When performing the independent process for producing the aromatic hydrocarbon mixture and / or LPG using the above-described pyrolysis gasoline, catalytic reforming oil and / or fluidized bed catalytic gasoline, etc. as raw material oil, LPG production together with aromatic production is performed in parallel with Korea. In regions where most of the LPG depends on imports, LPG produced as a by-product can replace a significant portion of the import. However, there is a disadvantage in that the amount of hydrogen used is high as a purge gas having a high hydrogen content generated in the process is used as the fuel in the process, thereby increasing the utilization of the LPG-rich non-aromatic carbon compound produced by the catalytic reaction. There is an urgent need for measures to reduce the amount of hydrogen used.

Accordingly, the present inventors can improve the productivity and efficiency of each process or the overall process integrated by integrating the process for producing aromatic hydrocarbon mixture and LPG from the hydrocarbon mixture and the production process of the hydrocarbon raw material which can be used as feedstock of the process. With this in mind, it was possible to complete the present invention.

Accordingly, an object of the present invention is to increase the productivity and efficiency of a process for producing aromatic hydrocarbon mixture and LPG from a hydrocarbon mixture, a process for producing a hydrocarbon raw material which can be used as a feedstock for the process, or an overall process incorporating them, thereby providing a light olefin system. It is to provide a method for the transpiration of hydrocarbons.

It is another object of the present invention to provide a method for recovering residual hydrogen that is used in a reaction when hydrogenated non-aromatic hydrocarbon compounds in the presence of a catalyst.

Another object of the present invention is to prepare a mixture rich in LPG components produced by hydrogenating non-aromatic hydrocarbon compounds in crude oil in the presence of a catalyst in the LPG separation tower of the crude oil production process without installing a separate LPG separation column. To provide a way to produce.

It is still another object of the present invention to provide a method of using ethane and LPG components produced when hydrogenating non-aromatic hydrocarbon compounds in crude oil in the presence of a catalyst as a process fuel as well as a pyrolysis process raw material.

In order to achieve the above and other purposes,

According to a preferred embodiment of the invention,

(a) introducing a hydrocarbon raw material mixture into a pyrolysis furnace for pyrolysis reaction;

(b) separating the reaction product obtained from the pyrolysis reaction into a stream containing hydrogen and C4 or less hydrocarbons and a stream containing C5 + hydrocarbons through compression and fractionation;

(c) recovering hydrogen and C2, C3 and C4 olefinic and paraffinic hydrocarbons from the stream comprising hydrogen and C4 or less hydrocarbons, respectively;

(d) separating the pyrolysis gasoline from the stream containing the C5 + hydrocarbon into a fraction comprising pyrolysis gasoline and a C6 + hydrocarbon through a hydrogenation reaction and a separation process;

(e) introducing the separated pyrolysis gasoline, hydrocarbon feed mixture and hydrogen into at least one reaction zone;

(f) converting the hydrocarbon starting mixture in the reaction zone into an aromatic hydrocarbon compound rich in benzene, toluene and xylene (BTX) via (iv) dealkylation / transalkylation reaction in the presence of a catalyst, and (ii) Converting to a LPG-rich nonaromatic hydrocarbon compound via hydrocracking reaction;

(g) the reaction product of step (f) is subjected to gas-liquid separation through a top stream comprising hydrogen, methane, ethane and LPG, and a bottom comprising aromatic hydrocarbon compounds and a small amount of hydrogen and non-aromatic hydrocarbon compounds. Separating into a flow;

(h) circulating the top stream through the compression and classification process of step (b); And

(i) recovering the aromatic hydrocarbon compound from the bottoms stream;

Provided is a method for tranking a light olefin hydrocarbon compound from a hydrocarbon raw material mixture comprising a.

Here, the method may further include circulating at least a portion of the C2 to C4 paraffinic hydrocarbons respectively recovered in step (c) into the pyrolysis furnace of step (a).

On the other hand, in step (h), some of the top stream may be separated and circulated into the reaction zone of step (f), or the entire amount of the top stream may be circulated through the compression and sorting process of step (b). have.

In addition, the method may further comprise the step of separating the aromatic hydrocarbon compound recovered in step (i) into benzene, toluene, xylene and C9 + aromatic compounds, respectively.

The catalyst of step (f) is at least one selected from the group consisting of mordenite, beta zeolite and ZSM-5 zeolite, 10 to 95% by weight zeolite having a mole ratio of silica or alumina and inorganic binder 5 to 90 It is preferable that the mixture is used as a carrier by mixing the weight%, and prepared by supporting platinum / tin or platinum / lead on the mixed carrier.

Meanwhile, the hydrocarbon raw material mixture may be selected from the group consisting of catalytic reforming oil, pyrolysis gasoline, fluidized bed catalytic gasoline, C9 + aromatic containing mixture, naphtha and mixtures thereof.

According to another preferred embodiment of the invention,

(a) introducing a hydrocarbon raw material mixture into a pyrolysis furnace for pyrolysis reaction;

(b) separating the reaction product obtained from the pyrolysis reaction into a stream containing hydrogen and C4 or less hydrocarbons and a stream containing C5 + hydrocarbons through compression and fractionation;

(c) recovering hydrogen and C2, C3 and C4 olefinic and paraffinic hydrocarbons from the stream comprising hydrogen and C4 or less hydrocarbons, respectively;

(d) separating the pyrolysis gasoline from the stream containing the C5 + hydrocarbon into a fraction comprising pyrolysis gasoline and a C6 + hydrocarbon through a hydrogenation reaction and a separation process;

(e) introducing the separated pyrolysis gasoline, hydrocarbon feed mixture and hydrogen into at least one reaction zone;

(f) converting the hydrocarbon starting mixture in the reaction zone into an aromatic hydrocarbon compound rich in benzene, toluene and xylene (BTX) via (iv) dealkylation / transalkylation reaction in the presence of a catalyst, and (ii) Converting to a LPG-rich nonaromatic hydrocarbon compound via hydrocracking reaction;

(g) a top stream comprising hydrogen, methane, ethane, and LPG through the gas-liquid separation of the reaction product of step (f); and a bottom stream comprising aromatic hydrocarbon compounds and a small amount of hydrogen and non-aromatic hydrocarbon compounds. Separating into;

(h) circulating the top stream through the compression and classification process of step (b);

(i) separating from said bottoms stream into a stream comprising (i) an aromatic hydrocarbon compound and (ii) a small amount of hydrogen and non-aromatic hydrocarbon compounds; And

(j) circulating a stream comprising a small amount of hydrogen and non-aromatic hydrocarbon compounds separated in step (i) into the pyrolysis of step (a);

Provided is a method for tranking a light olefin hydrocarbon compound from a hydrocarbon raw material mixture comprising a.

According to another preferred embodiment of the invention,

(a) introducing a hydrocarbon raw material mixture into a pyrolysis furnace for pyrolysis reaction;

(b) separating the reaction product obtained from the pyrolysis reaction into a stream containing hydrogen and C4 or less hydrocarbons and a stream containing C5 + hydrocarbons through compression and fractionation;

(c) recovering hydrogen and C2, C3 and C4 olefinic and paraffinic hydrocarbons from the stream comprising hydrogen and C4 or less hydrocarbons, respectively;

(d) introducing a fluidized bed catalytic cracking gasoline into the stream containing C5 + hydrocarbons and separating the same into pyrolysis gasoline and an oil comprising C6 + hydrocarbons through a hydrogenation reaction and a separation process;

(e) introducing the separated pyrolysis gasoline, hydrocarbon feed mixture and hydrogen into at least one reaction zone;

(f) converting the hydrocarbon starting mixture in the reaction zone into an aromatic hydrocarbon compound rich in benzene, toluene and xylene (BTX) via (iv) dealkylation / transalkylation reaction in the presence of a catalyst, and (ii) Converting to a LPG-rich nonaromatic hydrocarbon compound via hydrocracking reaction;

(g) a top stream comprising hydrogen, methane, ethane, and LPG through the gas-liquid separation of the reaction product of step (f); and a bottom stream comprising aromatic hydrocarbon compounds and a small amount of hydrogen and non-aromatic hydrocarbon compounds. Separating into;

(h) circulating the top stream through the compression and classification process of step (b);

(i) separating from said bottoms stream into a stream comprising (i) an aromatic hydrocarbon compound and (ii) a small amount of hydrogen and non-aromatic hydrocarbon compounds; And

(j) circulating a stream comprising a small amount of hydrogen and non-aromatic hydrocarbon compounds separated in step (i) into the pyrolysis of step (a);

Provided is a method for tranking a light olefin hydrocarbon compound from a hydrocarbon raw material mixture comprising a.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 to 3 are each a process diagram showing preferred embodiments for the nitration of light olefinic hydrocarbons from a hydrocarbon stock mixture in accordance with the present invention.

1 to 3, a hydrocarbon raw material mixture fraction 111 such as Naphtha, which is used as a raw material of the pyrolysis process, is introduced into the pyrolysis furnace 131 and subjected to a pyrolysis reaction in the presence of steam. Is converted to a light gas component 112, which is introduced into the compression and fractionation section 132.

The hydrocarbon raw material mixture used in the present invention is preferably a hydrocarbon having a boiling point of 30 to 250 ° C., from a group consisting of catalytic reforming oil, pyrolysis gasoline, fluidized bed catalytic gasoline, C9 + aromatic containing mixture, naphtha and mixtures thereof. Can be selected.

Hydrogen and light hydrocarbons 113 separated from the compression and fractionation unit 132 are introduced into the cooling unit 133 to separate the hydrogen 116 and hydrocarbons 117 there. On the other hand, the hydrocarbon separated therefrom is introduced into the fractionation unit 135 at the rear end of 117, and ethylene (118) and propylene (119), which are the main reaction products of the pyrolysis process, are ethane (120), propane (121) and butane. Produced separately from the (122) and C5 (115) fraction. At this time, the ethane 120, propane 121, and butane 122 produced by the fractionation unit 135 are circulated to the pyrolysis furnace 131 as raw material 126 of all or part of the pyrolysis reaction, and ethylene which is a main product of the pyrolysis furnace. The yield of 118 and propylene 119 can be increased.

Meanwhile, the heavy hydrocarbon (C5 +) 114 separated from the compression and fractionation unit 132 is a hydrogenation reaction and separation process unit 134, like the hydrocarbon (C5 +) 115 flowing from the fractionation unit 135. The sulfur compound contained in the oil is introduced into the hydrocarbon state 123 which is converted and removed, which is further introduced into the fractionation unit 136 at the rear end and separated into pyrolysis gasoline 124 and an oil 125 including C9 + hydrocarbons. .

On the other hand, the pyrolysis gasoline 124 separated therefrom is used as a reaction raw material component of the process for producing an aromatic hydrocarbon mixture and liquefied petroleum gas (LPG) from the hydrocarbon mixture.

That is, the pyrolysis gasoline 124 is combined with the hydrogen 22 and the high purity hydrogen 12 and 116 together with the hydrocarbon raw material mixture 11 and introduced into the reactor 3 as raw oil.

At this time, a separate heater (2) is installed to increase the temperature of the hydrogen / raw material mixture to the reaction temperature, the hydrogen / raw material mixture is discharged from the reactor (3) before entering the heater (2) heat exchanger (1) Through the heat exchange with the reaction product (15) circulated in) is introduced into the heater (2) in a state in which the temperature is raised to some extent (13).

The hydrogen / raw mixture 14 introduced into the reactor 3 is subjected to dealkylation, transalkylation and hydrogenation in the presence of a catalyst.

That is, in the reactor 3, hydrocracking reactions of non-aromatic hydrocarbon compounds, dealkylation reactions and transalkylation reactions of aromatic hydrocarbon compounds occur simultaneously, so that the main basic oils of petrochemical industry such as benzene, toluene, xylene, etc. And non-aromatic compounds, including LPG, are obtained as by-products.

Here, the catalyst charged in the reactor 3 to cause dealkylation reaction, transalkylation reaction and hydrogenation reaction is not particularly limited as long as it is known to those skilled in the art, but preferably as disclosed in US Pat. No. 6,635,792. Catalysts can be used.

That is, a carrier is prepared by mixing 10 to 95% by weight of zeolite having a molar ratio of 200 or less and 5 to 90% by weight of an inorganic binder, wherein at least one selected from the group consisting of mordenite, beta zeolite and ZSM-5 zeolite It can be used as, the catalyst prepared by supporting the platinum / tin or platinum / lead on the mixed carrier.

On the other hand, after the reaction is completed, the product 15 is present as a relatively hot gaseous product, circulated before being introduced into the gas-liquid separator 4, and introduced into the heat exchanger 1, where hydrogen / The heat is released to the raw material mixture and then passed through the cooler (5).

The product stream 17 passing through the cooler 5 is introduced into the gas-liquid separator 4 at a temperature of about 30 to 50 ° C. and separated into gaseous and liquid components. The gaseous component is withdrawn from gas-liquid separator 4 in an overhead stream 19 and the liquid component is withdrawn to bottom stream 18. At this time, the gas phase component 19 is composed of about 60 to 75% hydrogen and 25 to 40% hydrocarbon component on a molar basis. In particular, the hydrocarbon component is methane, ethane, LPG, or the like having a relatively low carbon number.

The top stream 19 enters and circulates 20 the compression and fractionation unit 132 of the pyrolysis process. Here, a portion 21 of the top stream 19 is separated and compressed in the compressor 6 and then combined with the incoming high purity hydrogen 12, 116 to adjust the hydrogen purity together with the raw material mixture 11. Into the reaction zone, or the total amount of the top stream 20 is introduced into the compression and sorting unit 132. In particular, when the total amount of the top stream 20 is introduced into the compression and fractionation unit 132 of the pyrolysis process and circulated, the compressor 6 may not be installed.

On the other hand, the total amount of liquid component 18 discharged to the bottom stream 18 is mostly aromatic, whereas it contains a small amount of residual hydrogen and light non-aromatic components. Thus, the liquid component 18 is subjected to a separate purification process again, benzene (28), toluene (29) having a residual hydrogen and non-aromatic component flow and purity of 99% or more depending on the boiling point in the fractionation section (7). , Xylene 30, C9 or more aromatic compounds may be separated.

On the other hand, the residual hydrogen and non-aromatic component flow 23 separated from the fractionation section 7 is also a C2-C4 paraffinic hydrocarbon stream (recirculated to the pyrolysis furnace 131, as shown in Figs. 2 and 3). 126) and can be used as raw material for pyrolysis.

In particular, when the fluidized bed catalytic cracking gasoline 127 is used as the raw material, as shown in FIG. 3, the fluidized bed catalytic cracking gasoline 127 is further introduced into the hydrogenation reaction and fractionation unit 134 of the pyrolysis process, thereby allowing fluidized bed catalytic cracking. Sulfur compounds and nitrogen compounds in gasoline 127 are converted / removed through the reaction and then circulated into the process.

As described above, according to the present invention, hydrocracking reactions usually require extra hydrogen, and the remaining hydrogen is used as in-process fuel, but according to the present invention, the hydrogen is consumed by being circulated to the compression and fractionation unit of the hydrocarbon pyrolysis process. Only as much hydrogen can be used and it can be improved to recover excess hydrogen.

In addition, in the case of non-aromatic components rich in ethane and LPG components, conventionally, LPG products were obtained as a process fuel or through a separate separation facility. However, when circulated to the compression and fractionation unit of a hydrocarbon pyrolysis process according to the present invention, pyrolysis The facility is equipped with LPG separation facilities, which can be improved to separate LPGs without having a separate LPG separation facility. In addition, when the non-aromatic components containing many of the ethane and LPG components are circulated into the pyrolysis furnace and used as a raw material for the pyrolysis furnace, there is an advantage in that light olefin hydrocarbons such as ethylene, in particular ethylene, which are the main products of the pyrolysis furnace, can be increased.

In addition, the gaseous product is obtained by separating into ethane, propane and butane through a separation facility including a conventional distillation column, or separating into an ethane / propane / butane mixture or separating into a hydrogen-containing state such as a pyrolysis process. Hydrogen recovery can also be achieved through integration with the olefin hydrocarbon production process. In addition, by separating the ethane / propane / butane mixture or each component, using all or part of the raw material for the pyrolysis furnace has the advantage that the light olefin hydrocarbon can be increased in the pyrolysis process.

The present invention can be more clearly understood by the following examples, which are only intended to illustrate the present invention and are not intended to limit the scope of the invention.

Example 1

Mordenite having a molar ratio of silica / alumina and 20 was mixed with aqueous solution of H ₂ PtCl ₆ and SnCl ₂ in the process of forming a mixed carrier using gamma alumina as a binder. It was made to be the weight%. Platinum and tin were formed to have a diameter of 1.5 mm and a length of 10 mm by carrying 0.05 part by weight and 0.5 part by weight with respect to 100 parts by weight of the total amount of mordenite and binder, respectively, and dried at 200 ° C. for 12 hours, and then at 4 ° C. at 500 ° C. The catalyst was prepared by firing for hours. The hydrocarbon mixture was tested using a catalyst prepared according to the above method. Experimental conditions and the results are shown in Table 1 below.

Examples 2 to 5 and Comparative Example 1

Hereinafter, a process for producing an aromatic hydrocarbon mixture and LPG from a hydrocarbon mixture according to the method of the present invention, and an oil rich in ethane and LPG components obtained from such an integrated process in integration with the pyrolysis process may be used as raw materials for the pyrolysis process. When it is necessary to confirm the performance when the pyrolysis is converted by the pyrolysis furnace, in the following examples, the experimental conditions and results are shown in Table 2 so that the effect on the pyrolysis furnace can be more clearly understood.

Example 2

The ethane obtained through Example 1 was tested under the conditions of using the raw material of pyrolysis furnace under operating conditions of weight ratio of steam and hydrocarbon of 0.3, pyrolysis temperature of 852 ° C., pressure of 0.8kg / cm ² g and residence time of 0.172 seconds. The conditions and the results are shown in Table 2 below.

Example 3

Propane obtained through Example 1 was tested under the conditions of using a raw material of pyrolysis in the operating conditions of weight ratio of steam and hydrocarbon 0.35, pyrolysis temperature 855 ℃, pressure 0.8kg / cm ² g, residence time 0.18 seconds operating conditions, The conditions and the results are shown in Table 2 below.

Example 4

Butane obtained in Example 1 was tested under the conditions of using the raw material of the pyrolysis furnace under the operating conditions of the weight ratio of steam and hydrocarbon 0.5, pyrolysis temperature 860 ℃, pressure 0.8kg / cm ² g, residence time 0.154 seconds, The conditions and the results are shown in Table 2 below.

Example 5

Conditions for using the C2, C3 and C4 mixture obtained in Example 1 as the raw material of the pyrolysis in the weight ratio of steam and hydrocarbon 0.35, pyrolysis temperature 860 ℃, pressure 0.8kg / cm ² g, residence time 0.173 seconds operating conditions The experiment was performed, and the experimental conditions and the results are shown in Table 2 below.

Comparative Example 1

Light Naphtha with boiling point of 35 ~ 130 ℃ is used as raw material for pyrolysis under operating condition of 0.552 weight ratio of steam and hydrocarbon, pyrolysis temperature of 855 ℃, pressure of 0.8kg / cm ² g and residence time of 0.152 seconds. Experiment was carried out, and the experimental conditions and the results are shown in Table 2 below.

As shown in Table 2, in the case of applying an integrated process in which a process for producing an aromatic hydrocarbon mixture and LPG from a hydrocarbon mixture according to the method of the present invention and a process for producing a hydrocarbon raw material usable as a feedstock of the process are applied. The productivity of light olefin hydrocarbons, particularly ethylene, in pyrolysis can be greatly improved.

As described above, according to the present invention, by integrating a process for producing an aromatic hydrocarbon mixture and LPG from a hydrocarbon mixture, and a production process of hydrocarbon raw materials that can be used as a feedstock of the process, the amount of hydrogen required for the process is reduced, The compressor may not be installed according to an optional process, and if there is room in the separation facility of the pyrolysis process, there is an advantage of improving economic efficiency by separating LPG without installing a separate LPG separation facility.

In addition, by using the LPG component and the ethane component separated in the process for producing the aromatic hydrocarbon mixture and the LPG from the hydrocarbon mixture as raw materials for the pyrolysis process, the productivity of the light olefin hydrocarbons, particularly ethylene, by pyrolysis can be improved.

In addition, when LPG is excessively used as a fuel for export or in-process, it can be integrated by increasing the utilization of LPG-rich non-aromatic carbon compounds produced by catalytic reaction and reducing hydrogen consumption through integration with raw material supply process rather than independent process. The productivity and efficiency of both processes can be improved.

All simple modifications and variations of the present invention fall within the scope of the present invention, and the specific scope of the present invention will be apparent from the appended claims.

Claims (16)

(a) introducing a hydrocarbon raw material mixture into a pyrolysis furnace for pyrolysis reaction; (b) separating the reaction product obtained from the pyrolysis reaction into a stream containing hydrogen and C4 or less hydrocarbons and a stream containing C5 + hydrocarbons through compression and fractionation; (c) recovering hydrogen and C2, C3 and C4 olefinic and paraffinic hydrocarbons from the stream comprising hydrogen and C4 or less hydrocarbons, respectively; (d) separating the pyrolysis gasoline from the stream containing the C5 + hydrocarbon into a fraction comprising pyrolysis gasoline and a C6 + hydrocarbon through a hydrogenation reaction and a separation process; (e) introducing the separated pyrolysis gasoline, hydrocarbon feed mixture and hydrogen into at least one reaction zone; (f) converting the hydrocarbon starting mixture in the reaction zone into an aromatic hydrocarbon compound rich in benzene, toluene and xylene (BTX) via (iv) dealkylation / transalkylation reaction in the presence of a catalyst, and (ii) Converting to a LPG-rich nonaromatic hydrocarbon compound via hydrocracking reaction; (g) a top stream comprising hydrogen, methane, ethane, and LPG through the gas-liquid separation of the reaction product of step (f); and a bottom stream comprising aromatic hydrocarbon compounds and a small amount of hydrogen and non-aromatic hydrocarbon compounds. Separating into; (h) circulating the top stream through the compression and classification process of step (b); And (i) recovering the aromatic hydrocarbon compound from the bottoms stream; A method for evaporating a light olefin hydrocarbon compound from a hydrocarbon raw material mixture comprising a. The hydrocarbon raw material according to claim 1, wherein the method further comprises circulating at least a portion of the C2 to C4 paraffinic hydrocarbons respectively recovered in the step (c) into the pyrolysis of the step (a). A process for the transpiration of light olefin hydrocarbon compounds from a mixture. The process of claim 1, wherein in step (h) a portion of the top stream is separated and circulated into the reaction zone of step (f), or the total amount of the top stream is compressed and classified in step (b). A method of tranking a light olefin hydrocarbon compound from a hydrocarbon raw material mixture, characterized in that it is circulated to. The method of claim 1, wherein the method further comprises the step of separating the aromatic hydrocarbon compound recovered in step (i) into benzene, toluene, xylene and C9 + aromatic compounds, respectively, light olefin from a hydrocarbon raw material mixture Method of transpiration of hydrocarbon compound. The zeolite of claim 1, wherein the catalyst of step (f) is at least one selected from the group consisting of mordenite, beta zeolite, and ZSM-5 zeolite, wherein the molar ratio of silica / alumina is 200 to 95% by weight. And mixing 5 to 90% by weight of an inorganic binder as a carrier, and supporting platinum / tin or platinum / lead on the mixed carrier to increase light olefin hydrocarbon compound from a hydrocarbon raw material mixture. The light olefin hydrocarbon of claim 1, wherein the hydrocarbon feed mixture is selected from the group consisting of catalytic reforming oil, pyrolysis gasoline, fluidized bed catalytic gasoline, C9 + aromatic containing mixture, naphtha and mixtures thereof. Method of transpiration compound. (a) introducing a hydrocarbon raw material mixture into a pyrolysis furnace for pyrolysis reaction; (b) separating the reaction product obtained from the pyrolysis reaction into a stream containing hydrogen and C4 or less hydrocarbons and a stream containing C5 + hydrocarbons through compression and fractionation; (c) recovering hydrogen and C2, C3 and C4 olefinic and paraffinic hydrocarbons from the stream comprising hydrogen and C4 or less hydrocarbons, respectively; (d) separating the pyrolysis gasoline from the stream containing the C5 + hydrocarbon into a fraction comprising pyrolysis gasoline and a C6 + hydrocarbon through a hydrogenation reaction and a separation process; (e) introducing the separated pyrolysis gasoline, hydrocarbon feed mixture and hydrogen into at least one reaction zone; (f) converting the hydrocarbon starting mixture in the reaction zone into an aromatic hydrocarbon compound rich in benzene, toluene and xylene (BTX) via (iv) dealkylation / transalkylation reaction in the presence of a catalyst, and (ii) Converting to a LPG-rich nonaromatic hydrocarbon compound via hydrocracking reaction; (g) a top stream comprising hydrogen, methane, ethane, and LPG through the gas-liquid separation of the reaction product of step (f); and a bottom stream comprising aromatic hydrocarbon compounds and a small amount of hydrogen and non-aromatic hydrocarbon compounds. Separating into; (h) circulating the top stream through the compression and classification process of step (b); (i) separating from said bottoms stream into a stream comprising (i) an aromatic hydrocarbon compound and (ii) a small amount of hydrogen and non-aromatic hydrocarbon compounds; And (j) circulating a stream comprising a small amount of hydrogen and non-aromatic hydrocarbon compounds separated in step (i) into the pyrolysis of step (a); A method for evaporating a light olefin hydrocarbon compound from a hydrocarbon raw material mixture comprising a. 8. The hydrocarbon raw material according to claim 7, wherein the method further comprises circulating at least a portion of the C2 to C4 paraffinic hydrocarbons respectively recovered in step (c) into the pyrolysis of step (a). A process for the transpiration of light olefin hydrocarbon compounds from a mixture. The process of claim 7, wherein in step (h), a portion of the top stream is separated and circulated into the reaction zone of step (f), or the entire amount of the top stream is compressed and classified in step (b). A method of tranking a light olefin hydrocarbon compound from a hydrocarbon raw material mixture, characterized in that it is circulated to. The zeolite according to claim 7, wherein the catalyst of step (f) is at least one selected from the group consisting of mordenite, beta zeolite, and ZSM-5 zeolite, and has a molar ratio of silica / alumina of 200 to 95 wt%. And mixing 5 to 90% by weight of an inorganic binder as a carrier, and supporting platinum / tin or platinum / lead on the mixed carrier. 8. The light olefin hydrocarbon of claim 7 wherein the hydrocarbon feed mixture is selected from the group consisting of catalytic reforming oil, pyrolysis gasoline, fluidized bed catalytic gasoline, C9 + aromatic containing mixture, naphtha and mixtures thereof. Method of transpiration compound. (a) introducing a hydrocarbon raw material mixture into a pyrolysis furnace for pyrolysis reaction; (b) separating the reaction product obtained from the pyrolysis reaction into a stream containing hydrogen and C4 or less hydrocarbons and a stream containing C5 + hydrocarbons through compression and fractionation; (c) recovering hydrogen and C2, C3 and C4 olefinic and paraffinic hydrocarbons from the stream comprising hydrogen and C4 or less hydrocarbons, respectively; (d) introducing a fluidized bed catalytic cracking gasoline into the stream containing C5 + hydrocarbons and separating the same into pyrolysis gasoline and an oil comprising C6 + hydrocarbons through a hydrogenation reaction and a separation process; (e) introducing the separated pyrolysis gasoline, hydrocarbon feed mixture and hydrogen into at least one reaction zone; (f) converting the hydrocarbon starting mixture in the reaction zone into an aromatic hydrocarbon compound rich in benzene, toluene and xylene (BTX) via (iv) dealkylation / transalkylation reaction in the presence of a catalyst, and (ii) Converting to a LPG-rich nonaromatic hydrocarbon compound via hydrocracking reaction; (g) a top stream comprising hydrogen, methane, ethane and LPG, and a bottom stream comprising an aromatic hydrocarbon compound and a small amount of hydrogen and non-aromatic hydrocarbon compounds through gas-liquid separation of the reaction product of step (f). Separating into; (h) circulating the top stream through the compression and classification process of step (b); (i) separating from said bottoms stream into a stream comprising (i) an aromatic hydrocarbon compound and (ii) a small amount of hydrogen and non-aromatic hydrocarbon compounds; And (j) circulating a stream comprising a small amount of hydrogen and non-aromatic hydrocarbon compounds separated in step (i) into the pyrolysis of step (a); A method for evaporating a light olefin hydrocarbon compound from a hydrocarbon raw material mixture comprising a. 13. The hydrocarbon raw material according to claim 12, wherein the method further comprises circulating at least a portion of the C2 to C4 paraffinic hydrocarbons recovered in the step (c) into the pyrolysis of the step (a). A process for the transpiration of light olefin hydrocarbon compounds from a mixture. The process of claim 12, wherein in step (h), a portion of the top stream is separated and circulated into the reaction zone of step (f), or the entire amount of the top stream is compressed and classified in step (b). A method of tranking a light olefin hydrocarbon compound from a hydrocarbon raw material mixture, characterized in that it is circulated to. The zeolite of claim 12, wherein the catalyst of step (f) is at least one selected from the group consisting of mordenite, beta zeolite, and ZSM-5 zeolite, wherein the molar ratio of silica / alumina is 200 to 95% by weight. And mixing 5 to 90% by weight of an inorganic binder as a carrier, and supporting platinum / tin or platinum / lead on the mixed carrier. 13. The light olefin hydrocarbon according to claim 12, wherein the hydrocarbon feed mixture is selected from the group consisting of catalytic reforming oil, pyrolysis gasoline, fluidized bed catalytic cracking gasoline, C9 + aromatic containing mixture, naphtha and mixtures thereof. Method of transpiration compound.

Images